2 * The socket based protocol for setting up a connection with rsyncd.
4 * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
5 * Copyright (C) 2001-2002 Martin Pool <mbp@samba.org>
6 * Copyright (C) 2002-2007 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
27 extern int output_motd;
33 extern int rsync_port;
34 extern int ignore_errors;
35 extern int kluge_around_eof;
36 extern int daemon_over_rsh;
37 extern int sanitize_paths;
38 extern int filesfrom_fd;
39 extern int remote_protocol;
40 extern int protocol_version;
41 extern int io_timeout;
43 extern int write_batch;
44 extern int default_af_hint;
45 extern int logfile_format_has_i;
46 extern int logfile_format_has_o_or_i;
47 extern mode_t orig_umask;
48 extern char *bind_address;
49 extern char *sockopts;
50 extern char *config_file;
51 extern char *logfile_format;
52 extern char *files_from;
54 extern struct chmod_mode_struct *chmod_modes;
55 extern struct filter_list_struct server_filter_list;
56 extern char curr_dir[];
61 int munge_symlinks = 0;
62 struct chmod_mode_struct *daemon_chmod_modes;
64 /* module_dirlen is the length of the module_dir string when in daemon
65 * mode, not chrooted, and the path is not "/"; otherwise 0. */
66 char *module_dir = NULL;
67 unsigned int module_dirlen = 0;
69 static int rl_nulls = 0;
72 static struct sigaction sigact;
76 * Run a client connected to an rsyncd. The alternative to this
77 * function for remote-shell connections is do_cmd().
79 * After negotiating which module to use and reading the server's
80 * motd, this hands over to client_run(). Telling the server the
81 * module will cause it to chroot/setuid/etc.
83 * Instead of doing a transfer, the client may at this stage instead
84 * get a listing of remote modules and exit.
86 * @return -1 for error in startup, or the result of client_run().
87 * Either way, it eventually gets passed to exit_cleanup().
89 int start_socket_client(char *host, int remote_argc, char *remote_argv[],
90 int argc, char *argv[])
93 char *p, *user = NULL;
95 /* This is redundant with code in start_inband_exchange(), but this
96 * short-circuits a problem in the client before we open a socket,
97 * and the extra check won't hurt. */
98 if (**remote_argv == '/') {
100 "ERROR: The remote path must start with a module name not a /\n");
104 if ((p = strrchr(host, '@')) != NULL) {
110 fd = open_socket_out_wrapped(host, rsync_port, bind_address,
113 exit_cleanup(RERR_SOCKETIO);
115 set_socket_options(fd, sockopts);
117 ret = start_inband_exchange(fd, fd, user, remote_argc, remote_argv);
119 return ret ? ret : client_run(fd, fd, -1, argc, argv);
122 static int exchange_protocols(int f_in, int f_out, char *buf, size_t bufsiz, int am_client)
125 #if SUBPROTOCOL_VERSION != 0
126 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
132 io_printf(f_out, "@RSYNCD: %d.%d\n", protocol_version, our_sub);
135 motd = lp_motd_file();
137 FILE *f = fopen(motd,"r");
138 while (f && !feof(f)) {
139 int len = fread(buf, 1, bufsiz - 1, f);
141 write_buf(f_out, buf, len);
145 write_sbuf(f_out, "\n");
149 /* This strips the \n. */
150 if (!read_line_old(f_in, buf, bufsiz)) {
152 rprintf(FERROR, "rsync: did not see server greeting\n");
156 if (sscanf(buf, "@RSYNCD: %d.%d", &remote_protocol, &remote_sub) < 1) {
158 rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n", buf);
160 io_printf(f_out, "@ERROR: protocol startup error\n");
164 if (remote_sub < 0) {
165 if (remote_protocol == 30) {
167 rprintf(FERROR, "rsync: server is speaking an incompatible beta of protocol 30\n");
169 io_printf(f_out, "@ERROR: your client is speaking an incompatible beta of protocol 30\n");
175 if (protocol_version > remote_protocol) {
176 protocol_version = remote_protocol;
179 } else if (protocol_version == remote_protocol) {
180 if (remote_sub != our_sub)
183 #if SUBPROTOCOL_VERSION != 0
184 else if (protocol_version < remote_protocol) {
190 if (protocol_version >= 30)
196 int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char *argv[])
199 char line[BIGPATHBUFLEN];
200 char *sargs[MAX_ARGS];
208 "ERROR: The remote path must start with a module name\n");
212 if (!(p = strchr(*argv, '/')))
213 modlen = strlen(*argv);
217 if (!(modname = new_array(char, modlen+1+1))) /* room for '/' & '\0' */
218 out_of_memory("start_inband_exchange");
219 strlcpy(modname, *argv, modlen + 1);
220 modname[modlen] = '/';
221 modname[modlen+1] = '\0';
224 user = getenv("USER");
226 user = getenv("LOGNAME");
228 if (exchange_protocols(f_in, f_out, line, sizeof line, 1) < 0)
231 /* set daemon_over_rsh to false since we need to build the
232 * true set of args passed through the rsh/ssh connection;
233 * this is a no-op for direct-socket-connection mode */
235 server_options(sargs, &sargc);
237 if (sargc >= MAX_ARGS - 2)
240 sargs[sargc++] = ".";
243 if (sargc >= MAX_ARGS - 1) {
245 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
246 exit_cleanup(RERR_SYNTAX);
248 if (list_only && strncmp(*argv, modname, modlen) == 0
249 && argv[0][modlen] == '\0')
250 sargs[sargc++] = modname; /* we send "modname/" */
252 sargs[sargc++] = *argv;
260 print_child_argv("sending daemon args:", sargs);
262 io_printf(f_out, "%.*s\n", modlen, modname);
264 /* Old servers may just drop the connection here,
265 rather than sending a proper EXIT command. Yuck. */
266 kluge_around_eof = list_only && protocol_version < 25 ? 1 : 0;
269 if (!read_line_old(f_in, line, sizeof line)) {
270 rprintf(FERROR, "rsync: didn't get server startup line\n");
274 if (strncmp(line,"@RSYNCD: AUTHREQD ",18) == 0) {
275 auth_client(f_out, user, line+18);
279 if (strcmp(line,"@RSYNCD: OK") == 0)
282 if (strcmp(line,"@RSYNCD: EXIT") == 0) {
283 /* This is sent by recent versions of the
284 * server to terminate the listing of modules.
285 * We don't want to go on and transfer
286 * anything; just exit. */
290 if (strncmp(line, "@ERROR", 6) == 0) {
291 rprintf(FERROR, "%s\n", line);
292 /* This is always fatal; the server will now
293 * close the socket. */
297 /* This might be a MOTD line or a module listing, but there is
298 * no way to differentiate it. The manpage mentions this. */
300 rprintf(FINFO, "%s\n", line);
302 kluge_around_eof = 0;
305 for (i = 0; i < sargc; i++) {
306 write_sbuf(f_out, sargs[i]);
307 write_byte(f_out, 0);
309 write_byte(f_out, 0);
311 for (i = 0; i < sargc; i++)
312 io_printf(f_out, "%s\n", sargs[i]);
313 write_sbuf(f_out, "\n");
316 if (protocol_version < 23) {
317 if (protocol_version == 22 || !am_sender)
318 io_start_multiplex_in();
326 static char *finish_pre_exec(pid_t pid, int fd, char *request,
327 int argc, char *argv[])
334 write_buf(fd, request, strlen(request)+1);
335 for (j = 0; j < argc; j++)
336 write_buf(fd, argv[j], strlen(argv[j])+1);
341 if (wait_process(pid, &status, 0) < 0
342 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
344 if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n",
345 status, status < 0 ? ": " : "",
346 status < 0 ? strerror(errno) : "") < 0)
347 out_of_memory("finish_pre_exec");
353 static int read_arg_from_pipe(int fd, char *buf, int limit)
355 char *bp = buf, *eob = buf + limit - 1;
358 int got = read(fd, bp, 1);
360 if (got < 0 && errno == EINTR)
374 static int rsync_module(int f_in, int f_out, int i, char *addr, char *host)
378 char line[BIGPATHBUFLEN];
379 uid_t uid = (uid_t)-2; /* canonically "nobody" */
380 gid_t gid = (gid_t)-2;
381 char *p, *err_msg = NULL;
382 char *name = lp_name(i);
383 int use_chroot = lp_use_chroot(i);
384 int ret, pre_exec_fd = -1;
385 pid_t pre_exec_pid = 0;
386 char *request = NULL;
388 if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
389 rprintf(FLOG, "rsync denied on module %s from %s (%s)\n",
392 io_printf(f_out, "@ERROR: Unknown module '%s'\n", name);
395 "@ERROR: access denied to %s from %s (%s)\n",
401 if (am_daemon && am_server) {
402 rprintf(FLOG, "rsync allowed access on module %s from %s (%s)\n",
406 if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) {
408 rsyserr(FLOG, errno, "failed to open lock file %s",
410 io_printf(f_out, "@ERROR: failed to open lock file\n");
412 rprintf(FLOG, "max connections (%d) reached\n",
413 lp_max_connections(i));
414 io_printf(f_out, "@ERROR: max connections (%d) reached -- try again later\n",
415 lp_max_connections(i));
420 auth_user = auth_server(f_in, f_out, i, host, addr, "@RSYNCD: AUTHREQD ");
423 io_printf(f_out, "@ERROR: auth failed on module %s\n", name);
432 if (lp_transfer_logging(i) && !logfile_format)
433 logfile_format = lp_log_format(i);
434 if (log_format_has(logfile_format, 'i'))
435 logfile_format_has_i = 1;
436 if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
437 logfile_format_has_o_or_i = 1;
439 am_root = (MY_UID() == 0);
443 if (!name_to_uid(p, &uid)) {
445 rprintf(FLOG, "Invalid uid %s\n", p);
446 io_printf(f_out, "@ERROR: invalid uid %s\n", p);
453 if (!name_to_gid(p, &gid)) {
455 rprintf(FLOG, "Invalid gid %s\n", p);
456 io_printf(f_out, "@ERROR: invalid gid %s\n", p);
463 /* TODO: If we're not root, but the configuration requests
464 * that we change to some uid other than the current one, then
467 /* TODO: Perhaps take a list of gids, and make them into the
468 * supplementary groups. */
470 /* We do a push_dir() without actually calling chdir() in order
471 * to make sure that the module's path is absolute. After this
472 * check, module_dir will be set to an absolute path. */
473 module_dir = lp_path(i);
474 strlcpy(line, curr_dir, sizeof line);
475 if (!push_dir(module_dir, 1))
477 if (strcmp(curr_dir, module_dir) != 0)
478 module_dir = strdup(curr_dir);
479 push_dir(line, 1); /* Restore curr_dir. */
481 if (use_chroot || (module_dirlen = strlen(module_dir)) == 1) {
483 set_filter_dir("/", 1);
485 set_filter_dir(module_dir, module_dirlen);
488 parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT,
491 p = lp_include_from(i);
492 parse_filter_file(&server_filter_list, p, MATCHFLG_INCLUDE,
493 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
496 parse_rule(&server_filter_list, p,
497 MATCHFLG_INCLUDE | MATCHFLG_WORD_SPLIT,
498 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES);
500 p = lp_exclude_from(i);
501 parse_filter_file(&server_filter_list, p, 0,
502 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES | XFLG_FATAL_ERRORS);
505 parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT,
506 XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES);
511 if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) {
512 char *modname, *modpath, *hostaddr, *hostname, *username;
514 if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0
515 || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", module_dir) < 0
516 || asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0
517 || asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0
518 || asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0)
519 out_of_memory("rsync_module");
526 /* For post-xfer exec, fork a new process to run the rsync
527 * daemon while this process waits for the exit status and
528 * runs the indicated command at that point. */
529 if (*lp_postxfer_exec(i)) {
532 rsyserr(FLOG, errno, "fork failed");
533 io_printf(f_out, "@ERROR: fork failed\n");
537 if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0)
539 if (wait_process(pid, &status, 0) < 0)
541 if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0)
543 if (WIFEXITED(status))
544 status = WEXITSTATUS(status);
547 if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0)
549 system(lp_postxfer_exec(i));
553 /* For pre-xfer exec, fork a child process to run the indicated
554 * command, though it first waits for the parent process to
555 * send us the user's request via a pipe. */
556 if (*lp_prexfer_exec(i)) {
558 if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0)
560 if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) {
561 rsyserr(FLOG, errno, "pre-xfer exec preparation failed");
562 io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n");
565 if (pre_exec_pid == 0) {
566 char buf[BIGPATHBUFLEN];
569 set_blocking(fds[0]);
570 len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN);
573 if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0)
576 len = read_arg_from_pipe(fds[0], buf,
583 if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0)
588 close(STDOUT_FILENO);
589 status = system(lp_prexfer_exec(i));
590 if (!WIFEXITED(status))
592 _exit(WEXITSTATUS(status));
595 set_blocking(fds[1]);
596 pre_exec_fd = fds[1];
604 * XXX: The 'use chroot' flag is a fairly reliable
605 * source of confusion, because it fails under two
606 * important circumstances: running as non-root,
607 * running on Win32 (or possibly others). On the
608 * other hand, if you are running as root, then it
609 * might be better to always use chroot.
611 * So, perhaps if we can't chroot we should just issue
612 * a warning, unless a "require chroot" flag is set,
613 * in which case we fail.
615 if (chroot(module_dir)) {
616 rsyserr(FLOG, errno, "chroot %s failed", module_dir);
617 io_printf(f_out, "@ERROR: chroot failed\n");
620 if (!push_dir("/", 0))
623 if (!push_dir(module_dir, 0)) {
625 rsyserr(FLOG, errno, "chdir %s failed\n", module_dir);
626 io_printf(f_out, "@ERROR: chdir failed\n");
632 if ((munge_symlinks = lp_munge_symlinks(i)) < 0)
633 munge_symlinks = !use_chroot;
634 if (munge_symlinks) {
636 if (stat(SYMLINK_PREFIX, &st) == 0 && S_ISDIR(st.st_mode)) {
637 rprintf(FLOG, "Symlink munging is unsupported when a %s directory exists.\n",
639 io_printf(f_out, "@ERROR: daemon security issue -- contact admin\n", name);
640 exit_cleanup(RERR_UNSUPPORTED);
645 /* XXXX: You could argue that if the daemon is started
646 * by a non-root user and they explicitly specify a
647 * gid, then we should try to change to that gid --
648 * this could be possible if it's already in their
649 * supplementary groups. */
651 /* TODO: Perhaps we need to document that if rsyncd is
652 * started by somebody other than root it will inherit
653 * all their supplementary groups. */
656 rsyserr(FLOG, errno, "setgid %d failed", (int)gid);
657 io_printf(f_out, "@ERROR: setgid failed\n");
660 #ifdef HAVE_SETGROUPS
661 /* Get rid of any supplementary groups this process
662 * might have inheristed. */
663 if (setgroups(1, &gid)) {
664 rsyserr(FLOG, errno, "setgroups failed");
665 io_printf(f_out, "@ERROR: setgroups failed\n");
671 rsyserr(FLOG, errno, "setuid %d failed", (int)uid);
672 io_printf(f_out, "@ERROR: setuid failed\n");
676 am_root = (MY_UID() == 0);
679 if (lp_temp_dir(i) && *lp_temp_dir(i)) {
680 tmpdir = lp_temp_dir(i);
681 if (strlen(tmpdir) >= MAXPATHLEN - 10) {
683 "the 'temp dir' value for %s is WAY too long -- ignoring.\n",
689 io_printf(f_out, "@RSYNCD: OK\n");
691 opt_cnt = read_args(f_in, name, line, sizeof line, rl_nulls, &argv, &argc, &request);
694 err_msg = finish_pre_exec(pre_exec_pid, pre_exec_fd, request,
698 verbose = 0; /* future verbosity is controlled by client options */
699 ret = parse_arguments(&argc, (const char ***) &argv, 0);
700 am_server = 1; /* Don't let someone try to be tricky. */
701 if (lp_ignore_errors(module_id))
706 if (lp_fake_super(i))
708 else if (am_root < 0) /* Treat --fake-super from client as --super. */
711 if (filesfrom_fd == 0)
716 rprintf(FLOG, "rsync %s %s from %s@%s (%s)\n",
717 am_sender ? "on" : "to",
718 request, auth_user, host, addr);
720 rprintf(FLOG, "rsync %s %s from %s (%s)\n",
721 am_sender ? "on" : "to",
722 request, host, addr);
728 /* don't allow the logs to be flooded too fast */
729 if (verbose > lp_max_verbosity(i))
730 verbose = lp_max_verbosity(i);
733 if (protocol_version < 23
734 && (protocol_version == 22 || am_sender))
735 io_start_multiplex_out();
736 else if (!ret || err_msg) {
737 /* We have to get I/O multiplexing started so that we can
738 * get the error back to the client. This means getting
739 * the protocol setup finished first in later versions. */
740 setup_protocol(f_out, f_in);
742 /* Since we failed in our option parsing, we may not
743 * have finished parsing that the client sent us a
744 * --files-from option, so look for it manually.
745 * Without this, the socket would be in the wrong
746 * state for the upcoming error message. */
749 for (i = 0; i < argc; i++) {
750 if (strncmp(argv[i], "--files-from", 12) == 0) {
757 write_byte(f_out, 0);
759 io_start_multiplex_out();
762 if (!ret || err_msg) {
764 rwrite(FERROR, err_msg, strlen(err_msg), 0);
768 exit_cleanup(RERR_UNSUPPORTED);
771 if (lp_timeout(i) && lp_timeout(i) > io_timeout)
772 set_io_timeout(lp_timeout(i));
774 /* If we have some incoming/outgoing chmod changes, append them to
775 * any user-specified changes (making our changes have priority).
776 * We also get a pointer to just our changes so that a receiver
777 * process can use them separately if --perms wasn't specified. */
779 p = lp_outgoing_chmod(i);
781 p = lp_incoming_chmod(i);
782 if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) {
783 rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n",
784 am_sender ? "outgo" : "incom", p);
787 start_server(f_in, f_out, argc, argv);
792 /* send a list of available modules to the client. Don't list those
793 with "list = False". */
794 static void send_listing(int fd)
796 int n = lp_numservices();
799 for (i = 0; i < n; i++) {
801 io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
804 if (protocol_version >= 25)
805 io_printf(fd,"@RSYNCD: EXIT\n");
808 /* this is called when a connection is established to a client
809 and we want to start talking. The setup of the system is done from
811 int start_daemon(int f_in, int f_out)
817 io_set_sock_fds(f_in, f_out);
819 /* We must load the config file before calling any function that
820 * might cause log-file output to occur. This ensures that the
821 * "log file" param gets honored for the 2 non-forked use-cases
822 * (when rsync is run by init and run by a remote shell). */
823 if (!lp_load(config_file, 0))
824 exit_cleanup(RERR_SYNTAX);
826 addr = client_addr(f_in);
827 host = client_name(f_in);
828 rprintf(FLOG, "connect from %s (%s)\n", host, addr);
831 set_socket_options(f_in, "SO_KEEPALIVE");
833 set_socket_options(f_in, sockopts);
835 set_socket_options(f_in, lp_socket_options());
836 set_nonblocking(f_in);
839 if (exchange_protocols(f_in, f_out, line, sizeof line, 0) < 0)
843 if (!read_line_old(f_in, line, sizeof line))
846 if (!*line || strcmp(line, "#list") == 0) {
847 rprintf(FLOG, "module-list request from %s (%s)\n",
854 /* it's some sort of command that I don't understand */
855 io_printf(f_out, "@ERROR: Unknown command '%s'\n", line);
859 if ((i = lp_number(line)) < 0) {
860 rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n",
862 io_printf(f_out, "@ERROR: Unknown module '%s'\n", line);
866 #ifdef HAVE_SIGACTION
867 sigact.sa_flags = SA_NOCLDSTOP;
869 SIGACTION(SIGCHLD, remember_children);
871 return rsync_module(f_in, f_out, i, addr, host);
874 static void create_pid_file(void)
876 char *pid_file = lp_pid_file();
878 pid_t pid = getpid();
881 if (!pid_file || !*pid_file)
884 cleanup_set_pid(pid);
885 if ((fd = do_open(pid_file, O_WRONLY|O_CREAT|O_EXCL, 0666 & ~orig_umask)) == -1) {
887 fprintf(stderr, "failed to create pid file %s: %s\n", pid_file, strerror(errno));
888 rsyserr(FLOG, errno, "failed to create pid file %s", pid_file);
889 exit_cleanup(RERR_FILEIO);
891 snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
892 write(fd, pidbuf, strlen(pidbuf));
896 /* Become a daemon, discarding the controlling terminal. */
897 static void become_daemon(void)
904 fprintf(stderr, "failed to fork: %s\n", strerror(errno));
905 exit_cleanup(RERR_FILEIO);
912 /* detach from the terminal */
915 #elif defined TIOCNOTTY
916 i = open("/dev/tty", O_RDWR);
918 ioctl(i, (int)TIOCNOTTY, (char *)0);
922 /* make sure that stdin, stdout an stderr don't stuff things
923 * up (library functions, for example) */
924 for (i = 0; i < 3; i++) {
926 open("/dev/null", O_RDWR);
930 int daemon_main(void)
933 if (am_server && am_root <= 0)
934 config_file = RSYNCD_USERCONF;
936 config_file = RSYNCD_SYSCONF;
939 if (is_a_socket(STDIN_FILENO)) {
942 /* we are running via inetd - close off stdout and
943 * stderr so that library functions (and getopt) don't
944 * try to use them. Redirect them to /dev/null */
945 for (i = 1; i < 3; i++) {
947 open("/dev/null", O_RDWR);
950 return start_daemon(STDIN_FILENO, STDIN_FILENO);
953 if (!lp_load(config_file, 1)) {
954 fprintf(stderr, "Failed to parse config file: %s\n", config_file);
955 exit_cleanup(RERR_SYNTAX);
963 if (rsync_port == 0 && (rsync_port = lp_rsync_port()) == 0)
964 rsync_port = RSYNC_PORT;
965 if (bind_address == NULL && *lp_bind_address())
966 bind_address = lp_bind_address();
970 rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n",
971 RSYNC_VERSION, rsync_port);
972 /* TODO: If listening on a particular address, then show that
973 * address too. In fact, why not just do inet_ntop on the
974 * local address??? */
976 start_accept_loop(rsync_port, start_daemon);